Carburetor



March 1, 1932. BOSSARD 1,847,747

CARBURETOR Filed July 8, 1929 2 Sheets-Sheet 1 9% I I [Q i 2 5 |'l"' T,0

1!. 5 I ,z I i I II gwmntoc March 1, 1932. T1 BDSSARD .QRBURETOR FiledluLy 8, 1929 2 Sheets-Sheet 2 (Comma Patented Mar. 1, 1932 -f I i I Vomen STATES OFFICE Application am July 8, 1 92 9. serm at. 376,826.

' My invention relates to automobiles and 'rectly from the fuel in thetank and supplies more particularlyto fueling systems for intherichmixturefor idling of the en 'ne. troducing the fuel to the motor fromthe Theboss 3 is connected with the tank with a gasoline. tank. I vleadpipe 3b and supplies the running fuel 5 A furtherobject is toprovide a device to the engine. The boss3 is hollow at and is which whenused in combination with my a control needle valve 5 is carried in aboss fueling system, filed in the Patent Office, Sea formed on the underside of the boss 3, said rial- No. 270,231, filed April 16, 1928, w1llvalve to'c'ontrol the amount of fuel allowed vaporize the fueljafter ithas been taken from 'to pasS'throughthe opening 3a into the stand 1'0the tank, and introduce it to the englne- 1n pipe 6. "The said opening2a of the boss 210 a gaseousstate. I is partially closed and the openingtherein is These objects I accomplish with the decontrolledby a needlevalve-.11, thereby provice "illustrated in the accompanying drawvldingexternal means of controlling the flow ings in which similar numeralsand letters of fuel through the idling pipe and the fuel 5 ofreferencefindicate like parts throughout supplypipe. A stand pipe 6 isformed in- 66 the several views, and as described in the tegral with theplate 1, on the top side therespecification forming a part ofthisapplicaof, andis bifurcated into a pipe 8 and a 7 tion, and pointedout in the appended clalms. branch pipe 9. Thesaid pipe 8 is passed up FIn the drawings in which I have shown the through the main body 0thecasing A and o best and most preferred manner of building "apartialclosure boss 7 is secured across the :my' invention Figure 1 is adiagrammatlc sald casing, having a hole 7 a1 therethrough, view of theinstallation of the device on the through which the topend of the pipe 8r0- intake manifold of an engine with the lead trudes. *The end of thepipe 9 is carrie up pipes from the fuel supply tank shown,'parts alongthe side of the casing suflicient discut away. Figure 2 is a sideelevation of'the tanceto'clear the outer end of a flap valve 13.

device. Figure 3 is a longitudinal vertical An idling pipe 10 isconnected with thetop section of the device. i i side oftheplate 1, overthe end of the open- In the drawings I have shown'the casing of ing 2a,and leads up alongside of the pi 9 I my invention as'A', the intakemanifold as to a point just below the valve 13, at w ich 30 B, thespring'control chamber as C, the mopointthe idling pipe 10 is passedthrough one tor as D, theexhaustpipe as E, and the fuel side of the pipe9 and out, through the top tank as G. In the top of the fuel tank I openend thereof and said idling pi isexprovide my vaporizing device H, asillustrattended up into the intake'rnanifol B to a led in my formerapplication Serial N0. point 10a above the level of the throttle valve35'270,231"which matured to Patent"1,753,199 12. Thethrottle valve 12"ispivoted in the 86 issued April 8, 1930, and the connection which intake'mani'foldfby the pivot pin 12a and a joins the main surrounding heaterpipe with small opening is cut in one side to allow the the exhaust pipeis shown as F. "end 1011 of the pipe lO-to be passed there- I The casingA of my device is made in a through This construction provides an 10rightangle, with a portion A1 at right angles idling pipe uncontrolledby either flap valve 00 to the main body, and through which the air orby the throttle valve so that fuel is introfor the carburetionis'introduce'd. The botduced 'into' the engine through thisidling tomportion of the device is open at A2 and pipe atall times when the engineis idling. a-closure plate 1 is secured thereto by suit- Theflapvalve 13is pivoted within the main able means, said plate completely coveringcasing A'by a pin 13a and when the valve 06 said opening. On the bottomside of the is closed it completely closes the entire openplate L,"Iprovide two converging bosses2 ing ofthe casing A other than that spaceand 3, with the boss 2 of smaller diameter which has previously beenclosed by the clothan theboss 3. The said boss 2 isconnected sure? witha cut made in the outer end of 5 with'a leadpipe-2b which in turnleadsdithe said valve through which'the pipe 9 is casing A and at an anglethereto and said chamber is internallythreaded tolreceifvea cylindricalpiston chamber 17 which chamber'is hollow to receive the said piston 18.The free end of the saidpiston is hollowed out to receive one end ofaspring '19'which spring is carried between the piston and the closed.end ofthechamber :17, and theipressure ofh'the spring is down upon thepiston at all times with the tension to close the flap 0 valve 13 in thecasing'A. A hole is bored through the end of thepiston 18acljacent thevsocket and connecting the socket with the chamber in which the springis carried and aiplate- 2 1 is pressed into the said piston to hold theball on the end of the connecting rod 16 into the piston, socket. Thehole20 is to provide a valve action on the air contained inthe chamberbetween the head of the chamber 17. and, the piston 18so. that when thepiston is traveling up the oha rnbemair compressed thereabove, and whenthe'zpiston ,isftraveling down thei ballon the end of the connectingrodis moved slightly, away from the said hole 20 allowing the airtoipass therefthrough to prevent creation of suction or vacuum withinthe piston chamber. ,The outer side of the chamber C is provided with V.a boss to which a spring, 22 is securedby a 1 valve 11, andout'through-theend10'a of the Iscrew23; The free end of the spring 22 isprovided 'with alpressed dog 24 thereimsaid dog adaptedto fit intonotches 01 teeth 25. which, teeth25 are formed on the-outer periphery ofthe chamber 17. This allows for ,rotation of the chamber to varythetension ofthe spring 19 and for means of locking the chamber fromrotation so that it will not [change itsposition except by manualoperation for different adjustment of the spring tension. i a

A choke valve 28 is pivoted in the portion A1 of the main casing A byapin 29 andis to control the flow of air. therethrough, and for startingthe; motor when it is cold. A lever 29a is secured. on the end of thepin 29 and admire rod 30'is secured in the end thereofbya pin; 31. I

The throttle valve. 12 is cont-rolled by a lever'32' secured on theouter endofthe pin 12a and a throttle rod33 is provided to control themovement of .the valve 12.

The operationof my device is as follows:

The idling gasoline vapor is drawn from the tank-through the line 2b,the opening 2a; passingithroug'hthe pipe 10, around the [pipes beingabove the valve 13, the air which is allowed to pass the valve 13, willthoroughly mix with the vapors providing complete mixing of the fuelwith the necessary amount of air required for complete combustion of"the fuel after it has been introduced into the motor. As the motor isaccelerated by opening the'throttle valve 12 the suction of the motorwill draw more fuel vapors through the pipe 3a, and the flap valve 13will be drawn open commensurate with the suction of'the engine allowingjust the correct amount of air to enter'the upper portion of the casingA where it is mixed with the fuelvapors after they have been drawn outthrough the pipes 8 and 9. The positions of the pipe 8 and 9 being onopposite sides of the casing A, provides more complete mixing of thefuels before they are drawn into the intake manifolctandthence to theengine. This type of device shown is for using vapors as obtained fromthe tank by any suitable method, but it will be obvious that thecarburetor would work if the pipes 36 and 2b were 'carrying liquid fuelsinstead of vapors and were connected directly with a float chamber suchas would be necessary were the fuels supplied to the pipes froma vacuumtank or fuel pump. 7

' Havingthusdescribed my invention Idesire to secure by Letters Patentand claim In a fuelmixing device the combination of a casing having anair inlet at right angles thereto; means to manually close said inlet asdesired; a plate onthe bottom of said casing having two pipes extendingupwardly therefrom one of which is bifurcated with one end bent towardthe perimeter of the .bore and extended upward to near the top end ofthe casing and with the short end extended up through a hole in apartial closure in said casing; a throttle valve above said casing inthe intake manifold with the small- .er of the two pipes extended upthrough a cut in the throttle valve; a flap valve pivoted across saidcasing adjacent said partial closure; an opening in said flap valve toallow one leg of the bifurcated pipe to pass therethrough; a connectingrod pivoted on the side of said flap valve; a piston secured on the freeend of said rod by a ball and socket joint having some degree of playtherein an adjustable cylinder in which said piston is operated, saidcylinder being screwed into'a control chamber on one. side "of saidcasing a spring between the inner end of the cylinder and the top end ofthe said piston; anda port through said piston back of the ball andsocket joint with the ball end of the connecting rod adapted to closethe port when the flap Valve is drawn suddenly open and to allowpassageof air therearound when the flap valve is closing or movinggradually.

In testimony whereof he has aflixed his signature.

' THEODORE BOSSARD.

